3Com Switch 8800 Configuration Guide
Chapter 30 MSDP Configuration
30-12
30.3 Displaying and Debugging MSDP
I. Displaying and Debugging MSDP
After the above configuration, execute
display
commands in any view to display the
running information of MSDP and to verify the effect of the configuration.
Execute the
debugging
command in user view for the debugging of MSDP.
Table 30-17
Displaying and debugging MSDP configuration
Operation
Command
Display the numbers of sources and
groups of SA messages from a
specified autonomous domain
display msdp sa-count
[
as-number
]
Display the details of a MSDP peer
display msdp peer-status
[
peer-address
]
Display the (S,G) state learnt from
MSDP peer
display msdp sa-cache
[
group-address
|
[
source-address
] ]
[
autonomous-system-number
]
Display MSDP peer state
display msdp brief
Enable MSDP debugging
debugging msdp
{
all
|
connect
|
event
|
packet
|
source-active
}
Note that only after the
cache-sa-enable
command is executed, will the
display msdp
sa-count
command have output.
II. Tracing the Transmission Path of SA Messages on the Network
The
mtracert
command can be used in any view to trace the network path of multicast
data from multicast source to destination receiver and locate faults.
Table 30-18
Tracing the transmission path of SA messages on the network
Operation
Command
Trace the transmission
path of SA messages on
the network
msdp-tracert
{
source-address
} {
group-address
}
{
rp-address
}
[
max-hops max-hops
] [
next-hop-info
]
[
sa-info
] [
peer-info
] [
skip-hops skip-hops
]
Locating information loss and reducing configuration faults can be realized by tracing
the network path of the specified (S, G, RP) entries. After the transmission path of SA
messages is determined, the overflow of SA messages can be avoided by the correct
configuration.
